试题与答案

在一个不透明的口袋中装有大小、形状完全相同,只有颜色不同的4个白球和若干个黑球,

题型:选择题

题目:

在一个不透明的口袋中装有大小、形状完全相同,只有颜色不同的4个白球和若干个黑球,现每次摸出一个球,然后放回,搅匀,再摸,已知每次摸出一个球是白球的可能性为
1
3
,则口袋中黑球的个数为(  )
A.8B.10C.12D.14

答案:

球的总个数为:4÷

1
3
=12(个),

黑球的个数:12-4=8(个).

答:口袋中黑球的个数为8个.

故选:A.

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题型:单项选择题

Plan Quality is the process of identifying quality requirements and standards for the project and product, and documenting how the project will demonstrate compliance.() is a method that analyze all the costs incurred over the life of the product by investment in preventing nonconformance to requirements, appraising the product or service for conformance to requirement, and failing to meet requirements.

A.Cost-Benefit analysis

B.Control charts

C.Quality function deployment

D.Cost of quality analysis

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